B2624

STEERING COLUMN: POWER TILT AND POWER TELESCOPIC STEERING COLUMN SYSTEM: B2624: Vehicles Speed Malfunction
B2624 - Vehicles Speed Malfunction

DESCRIPTION

The multiplex tilt & telescopic ECU forms a network with the ECUs of other systems through the communication bus. Each ECU informs the other ECUs that they are connected to the network by outputting a specified signal (periodic signal) onto the communication bus on a regular basis. The multiplex tilt & telescopic ECU receives vehicle speed signals from the combination meter via the communication bus to prevent improper operation of the auto away/return function during driving.





HINT
(*1):

If the engine switch is turned off immediately after the vehicle comes to a sudden stop, the last vehicle speed signal may not be 0 km/h (0 mph).

INSPECTION PROCEDURE

PROCEDURE

1. CHECK OTHER DTC OUTPUT (MULTIPLEX COMMUNICATION SYSTEM)

(a) Check if multiplex communication system DTC B1271 is output.

Result:





HINT
DTC B1271 indicates a combination meter communication stop malfunction in the multiplex communication system.

B -- REPAIR CIRCUIT INDICATED BY OUTPUT CODE
A -- Continue to next step.

2. READ VALUE USING TECHSTREAM (SPEED SIGNAL)

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(c) Turn the Techstream on.

(d) Check the vehicle speed signal on the Techstream. Enter the following menus: Chassis / Tilt&Telescopic / Data List.

Tilt&Telescopic





Result:





HINT
Vehicle speed of 3 km/h (2 mph) or more may be displayed on the Techstream immediately after the vehicle comes to a sudden stop. This is caused by a delay in vehicle signal input via the communication bus and not a malfunction.

B -- REPLACE MULTIPLEX TILT & TELESCOPIC ECU

C -- CHECK COMBINATION METER SYSTEM

A -- REPLACE MULTIPLEX TILT & TELESCOPIC ECU